roberts



(No Model.)

T. LANAHAN 8: G. W. ROBERTS.

MEANS FOR HEATING RAILROAD CARS.

No. 367,347. Patented July 26, 1887.

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.dttorney u Finns PhnloLitbograP n Washington, 110.

UNITED STATES PATENT OFFICE.

THOMAS LANAHAN AND GEORGEW. ROBERTS, OF LOUISVILLE, KENTUCKY,

ASSIGNORS TO THEMSELVES AND CHARLES H. RICE, OF SAME PLACE.

MEANS FOR H EATING RAILROAD-CARS.

I SPECIFICATION forming part of Letters Patent No. 367,347, dated July 26. 1887.

Application filed February 26, 1887. Serial No. 229,004. (No model.)

To all whom it may concern.-

Be it known that we, THOMAS LANAHAN and GEORGE W. ROBERTS, of Louisville, in the county of Jefferson andv State of Kentucky,

have invented certain new and useful Improve mentsin Means for Heating Railroad-Cars; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being'had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in Which' Figure l is a side elevation, partly in section, of a locomotive-boiler having our invention applied thereto. Fig. 2 is a vertical crosssection of the same on line 00 a", Fig. 1. Fig. 3 is a similar section on line y 3 Fig. 1. Fig. 4 is a detail view of the valve I.

This invention relates to improvements in car heating and ventilating apparatus having especial application to railroad-cars; and its objects are to provide means upon the locomotive for furnishing air takenfrom the front of the same, and consequently free from dust and smoke, through aproper system of tubing and piping totheseveral cars in a train, and to so arrange the conducting-pipes upon thelocomotive that theair'will be caused to circulate through a series of coils heated by waste steam and hot air in the smoke-box and heat radiating from the fire-box, and thence conducted to the cars for heating and ventilating in cold weather,'or so that the air can be carried direct to the cars for the purpose of cooling and ventilating the same in warm weather. These ends we attain by the means illustrated in the accompanying drawings, and hereinafter fully described and claimed.

' Referring to the drawings by letter, A designates the boiler of an ordinary locomotive. In the smoke-box or cinder-chamber B, at the front end of said locomotive, we place a heater,

" C. This heater is made up of a series of return bends or jointed pipes, 0, corresponding pipes c of heater C can'be extended into this additional chamber, and thereby present a still greater amount of surface to be heated in said chamber by the steam from the cylinders and by the products of combustion escaping from the fire-box through the boiler-fines into the smoke-box before they pass out through the smoke-stack. The lowest or first bend, c, of

heater C passes through the lower wall of the lar to those now in use for air-brakes.

From its connection with pipe (I the heater C has its bends 0 extending along the sides of the smoke-box in regular succession until they have almostor entirely covered the inner face of the smoke-box, the bends, however, being widened at the proper points, so as not to hinder the entrance of the exhaust-steam, and also around the lower ends of the stack, as shown. The heater C thus has the form of a circular arch or concentric coil composed of straight bends which lie close to the walls of box B and do not obstruct the draft from the boilerflues through same. 1

The last coil of heater C hasits end extended through a proper opening in the wall of chamber B,and connected with a pipe, E, which extends rearward below the foot-board on the boiler on one side to the fire-box A thereof. There the pipe E connects witha series, F, of horizontal return-bend pipes, which extend downward on the outer side wall of the firebox, as shown, and the lowest pipe of this series connects with the lowest pipe of aseries of bends, G,situated on the outer front wall of the fire-box, and the upper pipe of bends G connects with the upper pipe of a series of similar horizontal bends, H, secured on the outer side of fire-box.A opposite bends F. It will be observed that'by thus coiling the airconducting pipe upon fire-box A the heat therefrom is communicated to the pipes and to the air therein, so that it is additionally heated in these coils F GE after it leaves coil C, where it is initially heated, and, further, that by this arrangement the air is kept in or passed through a heating-coil at a point much nearer the cars to which it is delivered. Gonsequentl y it will reach the cars with less loss of heat by radiation and absorption than it would if conducted direct from heater 0 to the cars.

The lowest pipe, 71,0f bends H extends rearward beyond the tirc-box,andis provided with a suitable coupling for eonhecting it with the heating-tubes of the several cars, which are all suitably provided with systems of air conducting and delivering pipes arranged in any proper manner and adapted to be connected with similar systems on adjoining cars or with the pipe 11, as described. The pipe It connects with the bends H and-with a pipe, H, by means of a threeway valve, I, as shown, so that the pipe h can be made to connect either with bends H or with pipe H,and when connected with one will be cut off from the other, for a purpose hereinafter stated. The pipe H runs forward and connects with the engine D opposite its piped, and both said pipes are provided with cocks It and (1, respectively, so that when air is forced through one pipe it may be prevented from entering through the other or escaping therethrongh. The air-cylinder of engine D is provided with'a suitable air-induction pipe, d, to deliver pure air to the same.

The operation of the invention is a follows: To supply heated air to warm and ventilate the ears, the engine D is operated and valve h closed and valve (1' opened. The valve I is also set to register the pipe It of bends H with the pipe H. The course of the air, then, is from pump D, through pipe (7, into heater 0, where it is highly heated, passing thence to the series of pipes F, G, and H successively, and being additionally heated or its heat maintained thereby, owing to the proximity of lirebox A, and thence passes through pipe H to the cars, where it is properly distributedl It will be observed that we maintain the heat of the air until it passes from the locomotive, and are thereby able to furnish the air .to the cars at a much higher temperature than it would be if any part of its conducting-pipe 011 the locomotive were entirely exposed to the atmosphere. If it is only desired to furnish fresh cool air to the cars, as is desirable in summer, the valve (lis closed, valve h opened, and valve I turned to cut off communication between pipes h and H and open communication between the sections of the latter pipe. The course of the air is then from engine D through pipes 11 to the cars, as before. \Ve

. propose, also, in some cases,protecting the airheating pipes by means of asbestus and simi .smoke-boxes of furnaces to form air-heaters,

and that air has been conducted from such coils by pipes running through the boiler or steam-space or through the firebox; but such devices are objectionablein that the convolute coils occupying the central space of the smokebox obstruct the draft through the dues, and, further, that when the air-delivering pipes from the coils are passed through the steamspace they are diffieult and expensive to adjust, are subjected to great pressure, and are soon rusted out,and permit steam to enter the air-passages, rendering expensive repairs necessary or the stoppage of the heating. XVhen passed through the fire-box, the pipe is soon burned out and gases arising from combustion of fuel are drawn into the air-pipe, thus rendering this construction objectionable apart from its expensiveness, and either of these constructions are soon utterly worthless for ventilating, as is obvious. Our invention, it will be observed, obviates all these difficulties, as the heater does not obstruct the draft, the air-pipes are not subjected to violent pressure or heat, can be cheaply and easily attached, and are readily accessible for repairs.

Having described our invention, what we claim is- 1. In a car heating and ventilating device, the combination of the pump D, heater 0, composed of the return-bends 0, connected therewith and situated in the smoke-box of the locomotive, with the series of return-bend pipes F, G, and H, located on the outside walls ofthe firebox and connecting with heater Cand delivery-pipe to the cars, all constructed and arranged substantially as and for the purpose specified.

2. The combination of air-engine D, piped, heater 0, composed of the concentric series of return-bends c, with the series of return-bends F, G, and H, the pipes h and H, the three-way valve I, and the valves h and d in pipes H and d, all constructed and arranged to operate substantially in the manner and for the purpose described.

In testimony that we claim the foregoing as our own we allix our signal u res in presence of two witnesses.

THOS. LANAHAN. GEORGE \V. ROBERTS.

\Vi tn esses J. V. COLEMAN, E. H. MEYER.

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